Seagull Caliber TY2807

Manufacturer	Seagull, Sea-Gull
Caliber Number	TY2807 (1601K, DG2807)
Movement Type	Automatic, self-winding mechanical
Diameter	28mm
Height	5.18mm
Jewels	20 or 21
Vibrations Per Hour	21,600 bph
Hacking Seconds?	Yes
Rotor Winding Direction	Bi-directional
Hand Count	3
Functions	Central hours; central minutes; central sweeping seconds
Country of Manufacture	Made in China
Known Models	Android Exotic Divemaster Ceramic AD481, Arbutus Modeler (Add your watch to the comments below…)

The Seagull caliber TY2807 is an affordable skeleton dial automatic watch movement. This is essentially the skeletonized version of the Seagull ST16. this caliber is available in a silver or gold tone finish.

Stuttering Seconds Hand:

Similar to the Miyota 8 series movements, the Seagull TY2807 seconds hand is an indirect drive system, therefore, you may experience “stuttering” seconds. This is normal and you can read more about it here.

Replacement Prices:

At the time of this post, replacement prices for the Seagull TY2807 were found online for around $35.00 USD.

Watches with this movement:

The TY2807 pictured below was found in this Android (Aragon) Exotic skeleton dial dive watch. If you have a watch with this movement, please share it in the comments.

21 or 20 Jewels?

Android watches using this caliber have been found with casebacks claiming 20 jewels and 21 jewels. It appears that the 21 jewels version is more accurate and perhaps Android made a mistake with the “20 jewels” casebacks. It doesn’t help that, as with most made in China movements, pertinent information such as caliber number, jewel count, and origin is not clearly visible on the movement. Therefore, we can only go by crowd-sourced data based on real world watches – in this case, there are two known examples: AD481 which Android (Aragon) says has 20 jewels (pictured above) and AD562 with 21 jewels. See comments below for more info.

Additional Resources:

• More Seagull movements